I think it's mostly just that a subscription seems weird for a tool like this. Most users would probably only need it occasionally, and with a subscription you can't just add it to your toolbox to grab when that time comes.
I know why the capital class loves MRR I'm just mad that OTC is ignored.
One-shot option seems attractive, but the desktop (MacOS at least) app market is actually so niche that the SAM is somewhere in the low thousands. So, if I would offer a one-time 100$ app, I'd have 100k$ before taxes. And for that revenue, there's developing, marketing, plus support and maintenance. So to match a dev's salary, I'd need to make 2-3 successful apps a year, that I'd also have to maintain for a long time.
I think maybe there's a mid-ground with buy forever, 1 year updates, so people get the product they paid for, and if they want updates or support the development they can re-buy, however I'm yet to hear opinions on this model.
As far as desktop software is concerned, I think this a commonly accepted approach. Sublime Text is probably the most notable example.
Personally I like the model, as long as old versions stay truly static and don't get enshittification updates. It aligns incentives on feature development far better than subscription models: if you make genuine improvements you get recurring sales, if you don't then existing users will just stay on the old version. And existing users are protected from features or UI changes they disagree with
I would be happy to pay $100 for unlimited access and be locked into the current version of the app, maybe only have minor version updates free so you don’t get locked into a buggy version.
But that’s a more complicated licensing model to implement I guess.
I’m cautious of adding subscription products i would depend on to my tools but if it’s something I definitely only need once a year I just buy a month of it.
Although $30/mo is a bit much for what it does. So if they did go one off presumably it would be about $500 a license.